diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b0055ae..14825ef 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -27,5 +27,5 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           push: true
-          file: dockerfile
+          file: Dockerfile
           tags: ${{ github.repository_owner }}/mobaxterm_genkey:latest